Here’s a futuristic problem that may not have occurred to you: If self-driving cars really catch on and the number of traffic fatalities plunges, so will the number of organs available for transplant. Currently, about 20 percent of donated organs come from people who die in car accidents.
Luckily, there’s a futuristic solution: 3D-printed organs. This technology is far from ready for the clinic, as researchers are still trying to figure out how to print out complex tissue structures with blood vessels and nerves. But for one early indicator of progress in this field, look to the eye.